My car gets 23-25 but, I don't do much in town driving. I would definately do the O2 sensor. Buy the $12 tool (slotted socket) and it is an easy job. I also bought the generic sensor with connectors. It is a cut and splice but pretty much a no brainer.

If you are roddin it round town though, don't expect better than about 15.

Can you go over the o2 sensor job again? What do you do with the slotted socket?

Luckydog : Its the 3.4L 6 cylinder. been the most reliable vehicle ive ever had, and Ive had a lot of vehicles.